Wiki - 2016-02-28
Table of contents
1. How to access the Duplicates function ?
2. How to use the tool ?
Which criterions (variables) can be compared ?
How to display a supplementary variable ?
3. How to remove a patient ?
Duplicate patients may induce bias in your statistics. Clean them before analyses !
In practice, duplicates correspond to patients (or biologic samples, ...) which have been included twice or more times in your series. Happily, a tool exists in EasyMedStat to find these duplicates and eventually remove them : it is called ... Duplicates.
Fig. 1 - Access the Duplicates tool by getting to "Data Manager" (1.) and then click on "Duplicates" (2.)
Basically, the tool will display the patients with the same birth date, gender and initials, grouped by birth date
You can adjust the number of criterions (variables) compared by changing the "Level of Rigor" (Fig. 2b).
You can select patients which have the same a. birth date, b. gender, c. initials, d. inclusion date, e. last consultation, f. death date.
For the moment, no other variable can be chosen to adjust duplicate search. But you can still display the variable of your choice (see How to display a supplementary variable ?).
Fig. 2 - Main functions of the Duplicates tool
a. Active filters : you can look for duplicates among a subset of patients if you use filters.
b. Level of Rigor defines how many criterions (variables) must be similar between two patients to be considered as duplicates.
c. Patient counter tells you the number of duplicate patients that have been found according to the level of rigor. The criterions (variables) compared are also detailed in this line.
d. Birth date is always compared between patients (fixed criterion). Patients are grouped by date of birth which is displayed here
e. Supplementary variable : this select list allows you to display another variable in addition to all of the criterions you chose. This is useful if you want to look for patients which may be included twice (e.g. if you create one "patient" for every blood sample, and that one patient can have several blood samples analyzed)
Fig. 3 - Display Supplementary variable using the select list